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Axial compression performances and bearing capacity prediction of self-compacting fly ash concrete filled circle steel tube columns
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Axial compression performances and bearing capacity prediction of self-compacting fly ash concrete filled circle steel tube columns
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Journal Article
Axial compression performances and bearing capacity prediction of self-compacting fly ash concrete filled circle steel tube columns
2024
Overview
To solve the problem of a large amount of fly ash accumulation and study the axial compression and bearing capacity prediction of the self-compacting fly ash concrete filled circle steel tube (SCCFST) columns, eight specimens are designed to explore the impact of concrete strength grade, internal structural measures, and additional parameters. The stress, progression of deformation, and failure mode of each specimen are observed during the loading process. The load–displacement curves, load-strain curves, characteristic load and displacement, ductility, and stiffness degradation are analyzed. The findings revealed that shear deformation occurred predominantly in the middle and upper portions of the steel tubes. Enhancing the strength of the concrete or adopting internal structural measures could increase the bearing capacity and ductility of the specimens. The peak load and ductility could be increased by up to 17.6 and 53.6%, respectively. The proposed unified calculation equation for the axial compression bearing capacity of SCCFST columns demonstrates notable reliability and precision. Furthermore, these tests offer valuable references for the engineering application of various forms of SCCFST columns, which are of significant importance in practical engineering.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
